Io the Wisp is a rangedstrengthhero who works best as part of a communicative team. With its support-oriented skill set, Io is able to share its strength through Tether and Overcharge, harass enemy heroes out of the lane with Spirits, and materialize itself and an ally anywhere on the map with Relocate.
Gank enemy heroes, push undefended lanes, save teammates from deep within enemy territory—the possibilities are endless, and Io features one of the highest skill ceilings in the game.

Io, does not need to be facing towards a unit in order to attack, use abilities, or items. It still has a front, marked by an arc-like effect, and a back.

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Io is everywhere, and in all things. Denounced by enemies as the great unmaker, worshiped by scholars as the twinkling of a divine eye, Io occupies all planes at once, the merest fraction of its being crossing into physical existence at any one moment.

Like the great twin riders Dark and Light, and yet another ancient traveler whose true history is lost to the ages, Io the Wisp is a Fundamental of the universe—a force older than time, a wanderer from realms far beyond mortal understanding. Io is nothing less than the sum of all attractive and repulsive forces within matter, a sentient manifestation of the charge that bind particles together. It is only in the controlled warping of these forces that Io’s presence can be experienced on the physical plane. A benevolent, cooperative force, Io bonds its strength to others so that the power of allies might be enhanced. Its motives inscrutable, its strength unimaginable, Io moves through the physical plane, the perfect expression of the mysteries of the universe.

Tethered units still benefit from all those effects even when turning invulnerable or when hidden.

The health and mana regeneration is only applied to the tethered unit if Io's respective pool is not full.

Healing effects like Mekansm are applied to the tethered unit depending on how much health was replenished on Io.

Mana restoring effects like Arcane Boots are applied fully to the tethered unit if 1 or more mana was replenished on Io.

An enemy unit may only be slowed ( stunned) once per cast of Tether.

If Io is tethered to an invisible unit, his enemies can only see a fake link leading to the invisible unit's last known location.

When the level 15 talent is chosen, the tethered ally's spells receive their Aghanim's Scepter upgrades until the Tether breaks.

Io does not require an Aghanim's Scepter for the talent to work.

Does not work for heroes who cannot drop their scepters.

When the level 20 talent is chosen, Io performs instant attacks on every enemy the tethered ally attacks.

The attacks are performed as soon as the ally launches their attack (including instant attacks). It does not matter whether the attack actually hits or not.

Does not perform attacks when the tethered ally also has Io tethered with (e.g. an allied Morphling morphed into Io), so that no infinite loop happens.

The instant attacks of Io can proc every attack modifier normally. The attacks have no True Strike, but completely ignore disarms." contains strip markers and therefore it cannot be parsed sufficiently.

Summon five particle spirits that dance in a circle around Io. If a particle collides with an enemy hero, it explodes, damaging all enemy units in an area around it. Creeps take minor damage from touching a particle spirit, but do not cause them to explode. When its duration ends, any remaining spirits explode.

Cast Animation: 0+0

Spirits Spawn Radius: 150

Collision Radius: 70

Explosion Radius: 300

Collision Damage: 8/14/20/26

Explosion Damage: 25/50/75/100 ( 115/140/165/190)

Spirits Duration: 19

20/18/16/14

150

Modifiers

Spirits: Undispellable.

Io twists the particles of the universe with his unimaginable capabilities.

Mekansm heals Io's Tethered partner for 625 health, as opposed to the standard 250. It also provides an armor and health regeneration aura to boost survivability.

Late game:

Guardian Greaves is built from Mekansm and Arcane Boots, saving a slot for another item. The active ability, Mend, restores huge amount of health and mana to Io and its team, especially when under Tether.

Glimmer Cape allows Io to escape from enemies with invisibility and magic resistance; Io can also use it on an ally as well to save them.

Io is the name of a priestess of Hera in Greek Mythology. She was seduced by Zeus and subsequently incurred Hera's wrath.

Io is also the name of one of four Galilean moons of Jupiter, which was named after the same character in Greek Mythology.

Io's fun names in DotA were Weird Ball and Santelmo. Santelmo may refer to St. Elmo's Fire, a weather phenomenon that creates sparks of bright energy similar to that of lightning, mostly occurring from sharply pointed structures.

Enigma, Io, Keeper of the Light, and Chaos Knight together represent the four fundamental forces of the universe with Io representing the electromagnetic force, as alluded to in his lore as the force that binds all matter together, as well as his abilities which mostly rely on being bound to a partner to achieve maximum effect.

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